Process of crystallizing brass surfaces.



in cold, clear water.

. earns arnnar ra ion.

or 'rnann HAUTE, INDIANA, assrdnon or ONE-HALF TO JACOB JDEHECK, orTERBE HAUTE, moraine.

PROCESS OF CRYSTALLI IZING BRASS SURFACES.

Ito Drawing.

To all whom it may concern:

Be it known that l, O'r'ro ROY HAsnNonR, f;

' State of Indiana, have invented a new and useful Process ofGrystallizing Brass Surfaces, of which the, following is aspecification.

T he present invention relates to improvements in a process forcrystallizing brass sur-- faces whereby an ornamental surface isproduced upon the exposed portions thereof, either upon sheet or castbrass, such surface to be finally lacquered so as to retain the desiredflaked or crystallized surface and coloring accomplished by the presentprocess.

lln carrying out the present process, there are substantially four stepsto produce the completed article.

The first step consists in dipping the cast or sheet brass in a solutioncontaining one part of nitric acid and two parts of sulfuric acid. Afterremaining in this solution for a period of time approximately from fiveto ten seconds the brass is removed and rinsed in clear, cold water.This step of the process results in the removal of all scale, dust andgrease and brightens thebrass.

The second step consists in dipping the brass thus affected by thenitric and sulfuric acids in 'a solution of 'water in which 8 ounces ofpotassium cyanid is dissolved to After the brass reeach gallon of water.mains in this solution for a predetermined period of time approximatelyfrom five to ten seconds the same is removed and dipped This step of theprocess prevents the brass from tarnishing.

A third step consists in placing the brass in sawdust which is dampenedor moistened with a solution of water, in which to each half gallonthereof, there is 10 ounces of salammoniac and 2 ounces of blue vitriol.Care must be taken that the sawdust is not too moist, it merely beingdampened. After topies of this patent may be obtained for Specificationofl'ietters Patent.

Patented nee. 12, rain.

Application filed. October 14, fem. sen-aim 0. 866,723.

, remaining in the sawdust approximately for apelriod of from one tofive minutes the brass is removed from the sawdust and rinsed well inclear, cold water and finally dried-lay dipping in and removing fromboiling water. This step of the process results in the crystallizing ofthe surface of the brass.

The fourth step in the process consists in lacquering the surface thusaffected, by the various steps heretofore described with a chip lacquer,it preferably being placed thereupon to produce a brown shade.

It has been found with this process, that the surface of the brasseither in sheet or cast brass is crystallized or flaked, and

. that a beautiful finish is accorded thereto if this process is carriedout with care.

What is claimed is:

The herein described process of crystallizing brass surfaces, whichconsists first in dipping the brass in a solution containing one part ofnitric acid and two parts of sulfuric acid and maintaining the brass insaid solution from five to ten seconds, then removing the brass andwashing it in cold water and dipping the brass in a solution containingeight ounces of potassium cyanid to a gallon of water, where the brassis kept for from five to ten seconds, after which the brass is Washed'incold water, and then placing the brass in sawdust which contains amixture consisting of ten ounces of salam moniac, two ounces of bluevitriol to a half gallon of water, the brass being kept in the sawdustfor a period of from one to five minutes, after which it is washed incold water and finally dried by dipping it in and removing it fromboiling water.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

' OTTO nor nasnnonn.

"Witnesses FRANK B. MILLnn, PERRY A. HALL.

five cents each, by addressing the Commissioner of Patents. Washington,D. G.

